Description
Quick answer: Untreated softwood shiplap cladding for internal wall lining, panelling and other dry or sheltered timber projects. The rebated profile overlaps from board to board for a neat traditional finish, while the untreated surface can be painted, stained or sealed to suit the job.
Where this shiplap works best
- Internal wall lining and timber panelling
- Workshops, sheds and garden buildings where the boards are protected from weather
- Decorative joinery and boarding
- Repairs where untreated shiplap is required
Because the timber is untreated, it is best used in dry or protected applications unless you apply a suitable treatment and maintain it for the environment.
Size & lengths
- Nominal size: 12 x 119mm
- Lengths: 4.2m, 4.5m and 4.8m
Select the length you need above for current pricing. Long boards help reduce joins across larger runs.
Why choose untreated shiplap?
- Natural softwood ready for your chosen paint, stain or finish
- Overlapping shiplap profile for a clean finished face
- Choice of 4.2m, 4.5m and 4.8m lengths
- Useful for internal panelling, lining and protected joinery
Need shiplap for external work?
For sheds, summerhouses, workshops and other exposed outdoor cladding, choose our Treated Redwood Shiplap Cladding.
To compare both options, visit the Shiplap Cladding collection. For different timber profiles, browse Timber Cladding.

